<div>
  <label>
    Dot Size Ratio:
    <kbn-info
      placement="right"
      info="Change the ratio of the radius of the smallest point to the largest point.">
    </kbn-info>
  </label>
  <input type="range" step="2" min="1" max="100" class="form-control" ng-model="vis.params.radiusRatio" />
</div>
